remove libasn1c dependency and use asn1c without libasn1c
TODO: re-introduce talloc integration for asn1 runtime
Change-Id: I2140509c5359727f304470249be2a726b9a8deb1
diff --git a/include/osmocom/rspro/ber_tlv_tag.h b/include/osmocom/rspro/ber_tlv_tag.h
new file mode 100644
index 0000000..60e8668
--- /dev/null
+++ b/include/osmocom/rspro/ber_tlv_tag.h
@@ -0,0 +1,60 @@
+/*-
+ * Copyright (c) 2003, 2004 Lev Walkin <vlm@lionet.info>. All rights reserved.
+ * Redistribution and modifications are permitted subject to BSD license.
+ */
+#ifndef _BER_TLV_TAG_H_
+#define _BER_TLV_TAG_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+enum asn_tag_class {
+ ASN_TAG_CLASS_UNIVERSAL = 0, /* 0b00 */
+ ASN_TAG_CLASS_APPLICATION = 1, /* 0b01 */
+ ASN_TAG_CLASS_CONTEXT = 2, /* 0b10 */
+ ASN_TAG_CLASS_PRIVATE = 3 /* 0b11 */
+};
+typedef unsigned ber_tlv_tag_t; /* BER TAG from Tag-Length-Value */
+
+/*
+ * Tag class is encoded together with tag value for optimization purposes.
+ */
+#define BER_TAG_CLASS(tag) ((tag) & 0x3)
+#define BER_TAG_VALUE(tag) ((tag) >> 2)
+#define BER_TLV_CONSTRUCTED(tagptr) (((*(const uint8_t *)tagptr)&0x20)?1:0)
+
+#define BER_TAGS_EQUAL(tag1, tag2) ((tag1) == (tag2))
+
+/*
+ * Several functions for printing the TAG in the canonical form
+ * (i.e. "[PRIVATE 0]").
+ * Return values correspond to their libc counterparts (if any).
+ */
+ssize_t ber_tlv_tag_snprint(ber_tlv_tag_t tag, char *buf, size_t buflen);
+ssize_t ber_tlv_tag_fwrite(ber_tlv_tag_t tag, FILE *);
+char *ber_tlv_tag_string(ber_tlv_tag_t tag);
+
+
+/*
+ * This function tries to fetch the tag from the input stream.
+ * RETURN VALUES:
+ * 0: More data expected than bufptr contains.
+ * -1: Fatal error deciphering tag.
+ * >0: Number of bytes used from bufptr. tag_r will contain the tag.
+ */
+ssize_t ber_fetch_tag(const void *bufptr, size_t size, ber_tlv_tag_t *tag_r);
+
+/*
+ * This function serializes the tag (T from TLV) in BER format.
+ * It always returns number of bytes necessary to represent the tag,
+ * it is a caller's responsibility to check the return value
+ * against the supplied buffer's size.
+ */
+size_t ber_tlv_tag_serialize(ber_tlv_tag_t tag, void *bufptr, size_t size);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _BER_TLV_TAG_H_ */